fix topic filter

src/modules/luminea_nx_4458.js

@@ -38,9 +38,9 @@ class Lineplug extends DeviceBase {
         // monitor queue
         this.mqtt.on('message', (topic, message) => {
             // message is Buffer
+            if (topic == this.topic_set) {  // verify that the topic is correct
                 let payload = message.toString()
                 this.logger.debug(`input ${topic}: ${payload}`)
-
                 try {
                     const jsonpayload = JSON.parse(payload)
                     if (jsonpayload.value != undefined) {
@@ -54,10 +54,11 @@ class Lineplug extends DeviceBase {
                     this.logger.trace(payload)
                     this.logger.trace(error)
                 }
+            }
         })
     }
 
-    stopWatcher(){
+    stopWatcher() {
         clearInterval(this.timer)
     }